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Wang C, Rao Q, Chen J, Su H, Yang Z, Zhang M, Chang F, Xie P. Cumulative effects of fish disturbance and vegetative propagules reduce the growth advantage of Vallisneria natans. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:175669. [PMID: 39168317 DOI: 10.1016/j.scitotenv.2024.175669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Revised: 08/03/2024] [Accepted: 08/18/2024] [Indexed: 08/23/2024]
Abstract
Benthivorous fish disturbance and density-dependent competition from adjacent macrophytes are two important biotic factors that significantly impact the growth of submerged macrophyte pioneer species, which is crucial for the success of eutrophication lake restoration. We conducted an outdoor mesocosm experiment to explore the individual and combined effects of these two factors on water quality and the growth of Vallisneria natans. The experiment involved two levels of fish (Misgurnus anguillicaudatus) disturbance crossed with two levels of Hydrilla verticillata vegetative propagule (shoot) intensity. The results showed that fish disturbance significantly increased the water column total nitrogen (TN), ammonia nitrogen (N-NH4), total phosphorus (TP), and phosphate‑phosphorus (P-PO4). V. natans exhibited restricted plant height elongation and decreased soluble carbohydrate (SC) and starch concentration in fish treatments. Fish disturbance inhibited the growth advantage of V. natans by increasing the extinction coefficient of the water column. There was no statistical significance in total biomass between the two macrophytes in increased vegetative propagule and fish treatments. H. verticillata exhibited a higher relative growth rate (RGR) and summed dominance ratio (SDR3) than V. natans in four treatments and the treatment with three shoots of H. verticillata and one M anguillicaudatus, respectively. Fish disturbance and vegetative propagules showed cumulative effects that negatively affected the RGR_V.H (V. natans relative to H. verticillata). Our findings indicated that benthivorous fish disturbance and vegetative propagules could individually and cumulatively reduce the growth advantage of the pioneer species, V. natans. Our study sheds light on the accumulated effects of multiple disturbances that simultaneously occur in lakes, which holds theoretical and practical importance for lake restoration efforts.
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Affiliation(s)
- Chaokun Wang
- Institute for Ecological Research and Pollution Control of Plateau Lakes, Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China; Southwest United Graduate School, Kunming 650092, China
| | - Qingyang Rao
- Institute for Ecological Research and Pollution Control of Plateau Lakes, Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China
| | - Jianfeng Chen
- Institute for Ecological Research and Pollution Control of Plateau Lakes, Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China.
| | - Haojie Su
- Institute for Ecological Research and Pollution Control of Plateau Lakes, Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China.
| | - Zhendong Yang
- Changjiang Survey, Planning, Design and Research Co.Ltd., Wuhan 430010, China
| | - Meng Zhang
- Jiangxi Academy of Environmental Sciences, Nanchang 330039, China
| | - Fengqin Chang
- Institute for Ecological Research and Pollution Control of Plateau Lakes, Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China
| | - Ping Xie
- Institute for Ecological Research and Pollution Control of Plateau Lakes, Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China; Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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Liu Y, Ndirangu L, Li W, Pan J, Cao Y, Jeppesen E. Response of Functional Traits of Aquatic Plants to Water Depth Changes under Short-Term Eutrophic Clear-Water Conditions: A Mesocosm Study. PLANTS (BASEL, SWITZERLAND) 2024; 13:1310. [PMID: 38794381 PMCID: PMC11124857 DOI: 10.3390/plants13101310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/06/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024]
Abstract
Aquatic plants play a key role in the structuring and functioning of shallow lake ecosystems. However, eutrophication often triggers shifts in plant communities and species diversity, especially in the early stages when the water is still clear. Additionally, water depth is an important factor regulating aquatic plant communities. We conducted a 50-day mesocosm study to investigate how water depth (50 cm and 100 cm) affected the functional traits (vertical expansion versus horizontal colonisation) of 20 aquatic plants under eutrophic clear-water conditions. Among the selected species, the submerged plants Hydrocotyle vulgaris and Limnophila indica exhibited higher plant height or biomass in deeper water, while the emergent plants Myriophyllum aquaticum showed the opposite trend. Additionally, Ludwigia peploides subsp. stipulacea exhibited better vertical growth than the remaining species, and the submerged species Vallisneria denseserrulata had better horizontal colonisation. There was a positive correlation between plant height and rhizome length, indicating the absence of a trade-off between vertical growth and horizontal expansion. Our findings suggest an overall resilience of aquatic plants to varying water depths within our study range and highlight the importance of analysing functional traits when selecting appropriate species in freshwater ecosystem restoration, particularly in the face of climate change-induced water depth fluctuations.
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Affiliation(s)
- Yang Liu
- Research Center of Aquatic Plant, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; (Y.L.); (L.N.); (W.L.); (Y.C.)
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Leah Ndirangu
- Research Center of Aquatic Plant, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; (Y.L.); (L.N.); (W.L.); (Y.C.)
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Wei Li
- Research Center of Aquatic Plant, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; (Y.L.); (L.N.); (W.L.); (Y.C.)
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Yani Wetland Ecosystem Positioning Observation and Research Station, Tibet University, Lhasa 850000, China
- Key Laboratory of Biodiversity and Environment on the Qinghai-Tibetan Plateau, Ministry of Education, Tibet University, Lhasa 850000, China
| | - Junfeng Pan
- Horticulture and Conservation Centre, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Yu Cao
- Research Center of Aquatic Plant, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; (Y.L.); (L.N.); (W.L.); (Y.C.)
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Erik Jeppesen
- Department of Ecoscience, Aarhus University, 8000 Aarhus, Denmark;
- Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Üniversiteler Mahallesi, Çankaya, Ankara 06800, Turkey
- Sino-Danish Centre for Education and Research (SDC), Beijing 100049, China
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650032, China
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Thomson-Laing G, Schallenberg L, Kelly D, Howarth JD, Wood SA. An integrative approach to assess the impact of disturbance on native fish in lakes. Biol Rev Camb Philos Soc 2024; 99:85-109. [PMID: 37621123 DOI: 10.1111/brv.13013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 08/10/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023]
Abstract
Freshwater fish are in a perilous state with more than 30% of species considered critically endangered. Yet significant ecological and methodological complexities constrain our ability to determine how disturbances are impacting native fish communities. We review current methods used to assess the responses of fish communities, especially native fish, to disturbances, with a focus on lakes. These methods include contemporary population surveys, manipulative experimental approaches, paleolimnological approaches and Indigenous Knowledge and social histories. We identify knowledge gaps, such as a lack of baseline data for native fish, an inability to assess the impact of historical disturbances, stressor response dynamics in contemporary multi-stressor environments, and natural disturbance regimes. Our assessment of the current methods highlights challenges to filling these knowledge gaps using the reviewed methods. We advocate strongly for the implementation of an integrative approach that combines emerging technologies (i.e. molecular-based techniques in contemporary surveys and paleolimnology) and underutilised knowledge streams (i.e. Indigenous Knowledge and social histories) which should be used in concert with conventional methods. This integrative approach will allow researchers to determine the key drivers of decline and the degree of change, which will enable more informed and successful management actions.
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Affiliation(s)
- Georgia Thomson-Laing
- Cawthron Institute, 98 Halifax Street, The Wood, Nelson, 7010, New Zealand
- Victoria University of Wellington, PO Box 600, Wellington, 6140, New Zealand
| | | | - David Kelly
- Cawthron Institute, 98 Halifax Street, The Wood, Nelson, 7010, New Zealand
| | - Jamie D Howarth
- Victoria University of Wellington, PO Box 600, Wellington, 6140, New Zealand
| | - Susanna A Wood
- Cawthron Institute, 98 Halifax Street, The Wood, Nelson, 7010, New Zealand
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Li F, Zuo Z, Zhao H, Yu W, Yu H, Yu D, Liu C. Adaptive responses and transgenerational plasticity of a submerged plant to benthivorous fish disturbance. Ecol Evol 2023; 13:ECE310398. [PMID: 37533969 PMCID: PMC10390469 DOI: 10.1002/ece3.10398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 07/14/2023] [Accepted: 07/21/2023] [Indexed: 08/04/2023] Open
Abstract
Submerged macrophytes play a key role in the restoration of shallow eutrophic lakes. However, in some subtropical lakes, benthivorous fishes dominate the fish assemblages and influence the growth of submerged plants. A comprehensive understanding of the direct and indirect effects of benthivorous fishes on submerged plants is important. We conducted mesocosm experiments to examine the effects of three densities of benthivorous fish, Misgurnus anguillicaudatus, on the water properties, the growth, asexual reproduction, and the germination of turions of Potamogeton crispus L. Our results showed that fish disturbance increased TN, TP, PO4-P, NH4-N, and NO3-N of the water, raising the extinction coefficient K, Chl a, and the periphyton biomass. Benthivorous fish disturbance reduced the total biomass, root length, relative growth rate (RGR), and branching number while increasing the plant height of P. crispus. The P stoichiometric homeostasis coefficient (H P) (except turions) and H N was lower in plant tissues due to fish disturbance. Benthivorous fish disturbances promoted turions formation (e.g., increased turions total numbers and biomass) of P. crispus. Moreover, P. crispus exhibited transgenerational plasticity for benthivorous fish affecting turion emergence. The maximum final germination rate occurred only when fish density in the mother plant grow experiment matched that in the turion germination experiment. Turions generated by P. crispus disturbed by low-density fish exhibited increased germination rates. Our findings suggest that controlling benthivorous fish reduces its indirect and direct effects on submerged vegetation, facilitating the successful restoration of these plants.
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Affiliation(s)
- Fuchao Li
- The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life SciencesWuhan UniversityWuhanChina
| | - Zhenjun Zuo
- The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life SciencesWuhan UniversityWuhanChina
| | - Haocun Zhao
- The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life SciencesWuhan UniversityWuhanChina
| | - Weicheng Yu
- The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life SciencesWuhan UniversityWuhanChina
| | - Haihao Yu
- The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life SciencesWuhan UniversityWuhanChina
| | - Dan Yu
- The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life SciencesWuhan UniversityWuhanChina
| | - Chunhua Liu
- The National Field Station of Freshwater Ecosystem of Liangzi Lake, Department of Ecology, College of Life SciencesWuhan UniversityWuhanChina
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Kajgrová L, Drozd B, Regenda J, Draštík V, Kočvara L, Kolařík T, Peterka J, Blabolil P. A comparative study of three fishery methods for sampling the invasive topmouth gudgeon (Pseudorasbora parva) in ponds. JOURNAL OF FISH BIOLOGY 2023; 102:1121-1128. [PMID: 36855935 DOI: 10.1111/jfb.15361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 02/22/2023] [Indexed: 05/13/2023]
Abstract
Invasive fish threaten ponds' ecological status and their ecosystem services, therefore obtaining a representative sample of fish community composition is fundamental to fishery management, research and nature conservation. Estimates of the size distribution, density and biomass of the topmouth gudgeon (Pseudorasbora parva) model species of invasive fish in three ponds were compared among three sampling methods: electrofishing, fish-trapping and throw-netting. The study illustrates that the invasive fish, P. parva, can be detected by all tested fishing methods, yet our results clearly showed that there are pronounced differences among methods in population characteristic estimates. Electrofishing and throw-netting gave biased information on the size distribution of P. parva. Fish-trapping and throw-netting gave reasonable P. parva density and biomass estimates, while electrofishing clearly underestimated it. All tested methods showed a body size increment of P. parva between summer and autumn sampling sessions, yet neither throw-netting nor electrofishing recorded an increment in its density. Our study showed that fish-trapping is the most reliable and affordable method to estimate invasive P. parva population characteristics in ponds despite more time-demanding sampling. The success depends on the mesh size of sampling gear, operator skill and habitat structure. The cost-effectiveness of the selected methods and the importance of invasive fish monitoring in ponds is discussed. The sampling gear must be considered carefully according to the aim of the monitoring.
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Affiliation(s)
- Lenka Kajgrová
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
| | - Bořek Drozd
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
| | - Ján Regenda
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
| | - Vladislav Draštík
- Institute of Hydrobiology, Biology Centre CAS, České Budějovice, Czech Republic
| | - Luboš Kočvara
- Institute of Hydrobiology, Biology Centre CAS, České Budějovice, Czech Republic
| | - Tomáš Kolařík
- Institute of Hydrobiology, Biology Centre CAS, České Budějovice, Czech Republic
| | - Jiří Peterka
- Institute of Hydrobiology, Biology Centre CAS, České Budějovice, Czech Republic
| | - Petr Blabolil
- Institute of Hydrobiology, Biology Centre CAS, České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
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Guo C, Li S, Ke J, Liao C, Hansen AG, Jeppesen E, Zhang T, Li W, Liu J. The feeding habits of small-bodied fishes mediate the strength of top-down effects on plankton and water quality in shallow subtropical lakes. WATER RESEARCH 2023; 233:119705. [PMID: 36801569 DOI: 10.1016/j.watres.2023.119705] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 12/19/2022] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
The proliferation of small-bodied fishes in lakes is often accompanied by deterioration of water quality and ecosystem function. However, the potential impacts of different types of small-bodied fish species (e.g., obligate zooplanktivores and omnivores) on subtropical lake ecosystems in particular have been overlooked mainly due to their small size, shorter life spans and lower economic value. Therefore, we conducted a mesocosm experiment to elucidate how plankton communities and water quality respond to different types of small-bodied fishes, including a common zooplanktivorous fish (thin sharpbelly Toxabramis swinhonis) and other small-bodied omnivorous fishes (bitterling Acheilognathus macropterus, crucian carp Carassius auratus and sharpbelly Hemiculter leucisculus). During the experiment, the mean weekly total nitrogen (TN), total phosphorus (TP), chemical oxygen demand (CODMn), turbidity, chlorophyll-a (Chl.α) and trophic level index (TLI) values were generally higher in treatments where fish were present compared to treatments where fish were absent, but responses varied. At the end of the experiment, phytoplankton abundance and biomass and the relative abundance and biomass of cyanophyta were higher while the abundance and biomass of large-bodied zooplankton were lower in the fish-present treatments. Moreover, the mean weekly TP, CODMn, Chl.α and TLI values were generally higher in treatments with the obligate zooplanktivore, thin sharpbelly, when compared to treatments with omnivorous fishes. Also, the ratio of zooplankton to phytoplankton biomass was the lowest, and the ratio of Chl.α to TP was the highest in treatments with thin sharpbelly. Collectively, these general findings indicate that an overabundance of small-bodied fishes can have adverse effects on water quality and plankton communities and that small-bodied zooplanktivorous fishes likely induce stronger top-down effects on plankton and water quality than omnivorous fishes. Our results emphasise that small-bodied fishes should be monitored and controlled if overabundant when managing or restoring shallow subtropical lakes. From the perspective of environmental protection, the combined stocking of different piscivorous fish species that feed in different habitat types could be a way forward to control small-bodied fishes with different feeding habits, but more research is needed to assess the feasibility of this approach.
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Affiliation(s)
- Chao Guo
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shiqi Li
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jie Ke
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuansong Liao
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Adam G Hansen
- Colorado Parks and Wildlife, Aquatic Research Section, Fort Collins, CO, United States
| | - Erik Jeppesen
- Department of Ecoscience and WATEC, Aarhus University, Silkeborg 8600, Denmark; Sino-Danish Centre for Education and Research, Beijing 100049, China; Limnology Laboratory, Department of Biological Sciences, Middle East Technical University, Ankara 06800, Turkey; Centre for Ecosystem Research and Implementation (EKOSAM), Middle East Technical University, Ankara 06800, Turkey; Institute of Marine Sciences, Middle East Technical University, Mersin 33731, Turkey
| | - Tanglin Zhang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Li
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Jiashou Liu
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
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Jara FG, Pueta M. Predatory invertebrates indirectly impact leaf‐litter breakdown by different foragers in temporary wetlands. J Zool (1987) 2023. [DOI: 10.1111/jzo.13048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- F. G. Jara
- Grupo de Ecología de Macroinvertebrados Acuáticos, INIBIOMA (CONICET–UNComa) Instituto de Investigaciones en Biodiversidad y Medioambiente, Centro Regional Universitario Bariloche‐Universidad Nacional del Comahue San Carlos de Bariloche Argentina
| | - M. Pueta
- Laboratorio de Ecología, Biología Evolutiva y Comportamiento de Herpetozoos, INIBIOMA (CONICET–UNComa) Instituto de Investigaciones en Biodiversidad y Medioambiente, Centro Regional Universitario Bariloche‐Universidad Nacional del Comahue San Carlos de Bariloche Argentina
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Zhao Y, Zhang Y, Guo J, Wang J, Li Y. Shifts in periphyton research themes over the past three decades. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:5281-5295. [PMID: 36402877 DOI: 10.1007/s11356-022-24251-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
It has been well documented that periphyton communities play a key role in primary productivity, nutrient cycling, and food web interactions. However, a worldwide overview of research on the key themes, current situation, and major trends within the field is lacking. In this study, we applied the machine learning technique (latent Dirichlet allocation, LDA) to analyze the abstracts of 6690 publications related to periphyton from 1991 to 2020 based on the Web of Science database. The relative frequency of classical and basic research on periphyton related to colonization, biomass, growth rate, and habitats has been clearly decreasing. The increasing trends of research on periphyton are embodied in the periphyton function in freshwater ecosystems (e.g., application as ecological indicators, function in the removal of nutrients, and application in paleolimnology), the research at macroscales (e.g., spatial-temporal variation, and functional and taxonomic diversity), and the anthropogenic themes (e.g., climate warming, response to multiple stressors, and land use type). The keyword and title analysis showed that the periphyton studies are concentrated mainly on diatom aspects, especially with respect to streams relative to lakes. The thematic space based on non-metric multidimensional scaling (NMDS) showed that the classical themes such as growth rate, colonization, and environmental factors (e.g., multiple stressors and climate warming) were most linked to other research themes. We proposed that future trends in the periphyton should focus on the function of periphyton in lakes and their response to multiple environmental pressures with the increasingly extensive eutrophication in lakes and the increasingly significant change in the climate.
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Affiliation(s)
- Yihan Zhao
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650500, China
| | - Yun Zhang
- College of Life Sciences, Hubei Normal University, Huangshi, 435002, China
| | - Jishu Guo
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650500, China
| | - Jun Wang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yanling Li
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650500, China.
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Climate-related drivers of nutrient inputs and food web structure in shallow Arctic lake ecosystems. Sci Rep 2022; 12:2125. [PMID: 35136177 PMCID: PMC8825857 DOI: 10.1038/s41598-022-06136-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 01/12/2022] [Indexed: 11/08/2022] Open
Abstract
In order to predict the effects of climate change on polar ecosystems, disentangling mechanisms of nutrient transfer in food webs is crucial. We investigated sources of nutrients in tundra lakes, tracing their transfer through the food web and relating the observed patterns to runoff, snow coverage, and the presence of migratory geese in lake catchments. C and N content (elemental and isotopic) of several food web components including Lepidurus arcticus (Notostraca, at the top of the lake food webs) in 18 shallow Arctic lakes was compared. Terrestrial productivity and geese abundance were key biotic factors that interacted with abiotic variables (snow coverage, lake and catchment size) in determining the amount and origin of nutrient inputs, affecting the trophic interactions among aquatic species, food chain length and nutrient flow in Arctic lake food webs. Decreasing snow coverage, increasing abundance and expansion of the geese's range are expected across the Arctic due to climate warming. By relating nutrient inputs and food web structure to snow coverage, vegetation and geese, this study contributes to our mechanistic understanding of the cascade effects of climate change in tundra ecosystems, and may help predict the response of lakes to changes in nutrient inputs at lower latitudes.
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Ren W, Wen Z, Cao Y, Wang H, Yuan C, Zhang X, Ni L, Xie P, Cao T, Li K, Jeppesen E. Cascading effects of benthic fish impede reinstatement of clear water conditions in lakes: A mesocosm study. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113898. [PMID: 34626943 DOI: 10.1016/j.jenvman.2021.113898] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 09/20/2021] [Accepted: 10/03/2021] [Indexed: 06/13/2023]
Abstract
In shallow eutrophic lakes, submersed macrophytes are essential for maintaining a clear water state, and they are affected markedly by fishes directly through herbivory and indirectly by fish-invertebrate-periphyton complexity, a pathway that presently is not well understood in subtropical lakes but probably vital to lake managements. We conducted a mesocosm study involving benthic fish (Misgurnus anguillicaudatus), snails (Radix swinhoei) and submersed macrophyte (Vallisneria natans), aiming to examine whether benthic fish is detrimental to reestablishment of clear-water macrophyte-dominated state in eutrophic degraded lakes. In addition, we aimed to investigate the cascading effect that benthic fish might have on periphyton and phytoplankton and to what extent snails can alleviate this effect. Our results showed that benthic fish promoted nutrient release from the sediment and thereby facilitated the growth of phytoplankton and periphyton, leading to reduced growth of submerged macrophytes due to shading. Snails consumed the periphyton attached on the leaves of macrophytes, thereby being beneficial to the plant growth, albeit it could not fully counteract the adverse effects from benthic fish. The water quality indicators in terms of nutrients concentrations, phytoplankton biomass and light extinction coefficient along the water column was affected primarily by benthic fish, followed by macrophytes and snails. To target a clear-water condition, the water quality was best at the presence of macrophytes alone or in combination with snails, and worst at the presence of benthic fish. Our results implied that the removal of benthic fish should be a useful ecological restoration method for rehabilitation of submersed macrophytes and water quality improvement in subtropic, eutrophic, shallow lakes following external nutrient loading reduction.
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Affiliation(s)
- Wenjing Ren
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Zihao Wen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Yu Cao
- Key Laboratory of Aquatic Botany and Watershed Ecology, Chinese Academy of Sciences, Wuhan Botanical Garden, Wuhan, 430074, China.
| | - Hao Wang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Changbo Yuan
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Xiaolin Zhang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Leyi Ni
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Ping Xie
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Te Cao
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Kuanyi Li
- Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Erik Jeppesen
- Department of Bioscience and WATEC, Aarhus University, Vejlsøvej, Silkeborg, 8600, Denmark; Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara, 06800, Turkey; Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, 100049, Beijing, China; Institute of Marine Sciences, Middle East Technical University, 33731, Erdemli-Mersin, Turkey.
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